Steam-boiler.



Patented Sept; I8, I900.

J. J. CAIN.

STEAM BOILER.

(Application filed Mar. 29, 1900.

(No Moder.)

ATTORNEY No. 657,9!3. Patented Sept. l8, I900.

J. J. cAm.

STEAM BOILER.

(Application filed Mar. 29, 1900.)

(No Model.)

3 SheetsSheet 3.

ATTORNEY lTED STATES JOHN J. CAIN, OF BAYONNE, NEW JERSEY.

.STEAM-BOI LER.

SPECIFICATION forming part of Letters Patent No. 657,913, dated September 18, 1900. Application filed March 29, 1900. Serial No. 10,606. (No model.)

To all whom it may concern.-

Be it known that I, JOHN J. CAIN, a citizen of the United States, and a resident of Bayonne, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

This invention relates to tubular steamboilers, the prime object of which is to provide means for the convenient and ready removal of the dirt and ashes that collect around the tubes and on the baffle-plates ordinarily used in this class of boilers to direct and distribute the products of combustion to and around the tubes. To this end doors are provided at the front of the boiler, through the openings of which the dirt and ashes may be removed without disturbing any other part of the boiler.

The invention also covers other novel features of construction to meet the requirements of the changes called for in providing for the cleaning of the boiler, as above described, and also to further improve this class of boilers.

The form of boiler to which my present improvements are shown applied comprises a series of tubes, headers to which the tubes are connected, and a drum in communication with the headers located beneath and in the same general direction as the tubes, so as to receive the direct heat of combustion of the fuel, as shown and described in my allowed application, Serial No. 737,547, filed November 29, 1899.

Figure 1 of the accompanying drawings is a vertical central longitudinal section of a boiler embodying myimprovements, taken on line 1 1, Fig. 2. Fig. 2is an elevation showing one half of the boiler in full front View with the casing removed and the other half in section taken on the line 2 2, Fig. 1; and Fig. 3 is a longitudinal section taken on the line 3 3, Fig. 2.

The front corner-boxes a a and the rear corner-boxes b b are here shown as each consisting of two sections coupled together by nipples, the lower sections being vertically arranged and the upper sections inclined forwardly, as shown in the longitudinal sections of the drawings.

Extending from the front to the rear cornenboxes and connected to them are square boxes 0 c, forming the sides of the furnace, and the tubes (Z d, forming the sides of the boiler above the furnace. The grate e, ashpit, fire and ash-pit doors, &c., are formed and arranged in the usual manner.

The drum f is located in the furnace and is supported by the bracket-saddles g, extending from the corner-boxes. The steamdrum m is supported upon and is in communication with the front corner-boxes a a. The rear headers Z Z are connected at their lower ends to the rear end of the water-drum f and at their upper ends to the steam-drum m by the pipes 72 n, as in my before-mentioned application.

The baffle walls and plates, whose functions are to cause an efficient distribution of the products of the combustion of the fuel among or about tubes j j, consist of the plates 0, extending laterally over the furnace from the sides of the drum f, being supported by angle-pieces secured to the drum, to the side walls or side tubes of the boiler, and longitudinally from the front end of the drum to about two-thirds of its length, the wall 9 extending from the rear end of the plates 0 upwardly and across the boiler to within a short distance of the upper tubes j and the wall q located between the wall 19 and the front of the boiler and extending from the top of the boiler to within a short distance of the plates 0.

To provide for the ready removal of the ashes and dust that may collect or accumulate on the plates 0, door-openings r r are formed in the front of the boiler alongside the front of the drum f, said openings being provided with suitable doors 8 s. This arrangement greatly facilitates the cleaning of the boiler, as all such work may be freely done from the front of the boiler, thus providing for the keeping of this class of boilers in clean condition, and consequently in good working order, which is now an annoying and difficult operation, particularly when a number of boilers are placed side by side and when but little free space surrounds them. i

In locating the cleaning-doors at the front of the boiler, as shown, it became necessary to or was found advantageous to provide a suitable connection between the front of the drum f and the front headers 10, the means here adopted for such purpose consisting of a horizontally-arranged box t, located between the lower ends of the headers 7c and the front end of the drum f, connected by the nipples 'u o to the drum, connected to the lower ends of the headers 70 10 by means of ordinary short nipples, and connected by its rear side to the lower parts of the rear headers Z Z by one, two, or more of the lower tier of tubes To maintain the drum f in as good a working condition as possible, partitions w and a; are placed therein near its ends in such manner that they may be readily removed when the drum is opened for a thorough cleaning, the one to at the front end of the drum forming a pocket for the collection of such dirt and deposit as may pass from the tubes j to the headers 70 is and the boxt and fall through the box into the drum, and the partition 00 at the rear end of the drum forms a pocket in which the dirt and deposit from the rear headers are collected. This pocket formed by the partition w also collects the initial deposit from the feed-water as it enters the drum through the feed-water pipe h, the upper end of the partition being turned backwardly, so as to extend over the end of the pipe to check the rush of the feed-water into the boiler, and so facilitate the settlement of the dirt and deposit at the rear end of the drum. The blowofi pipe is connected to the lower part of this rear pocket, providing for the removal of most of the mud from the boiler by the ordinary method of cleaning by blowing off the boiler. It is also thought advisable to place a baflieplate y in the steam-drum m in front of the openings of the pipes 11, which connect the headers l to the drum.

The products of combustion first act on the water-drum f and all pass upwardly around its rear end, between the tubes j at their rear ends, behind the baffle-wall p, then downwardly between the walls 19 and q, and up between the front parts of the tubes j, between the wall q and the headers in, and out by the stack 2. It is generally in this arrangement of baffle-walls in tubular boilers during the downward movement of the products of combustion that the principal deposit of ashes, 850., takes place and accumulate on thehorizontal portion of the baffles and often to such an extent in ordinary tubular boilers that the lower tubes are practically put out of service. The great facility with which such collection of ashes, 850., may be removed from the baffle-plates through the front door-openings 4" r enables a boiler provided with this part of my invention to be always kept in first-class working condition with very little labor.

I claim as my invention- 1. In a steam-boiler comprisinga grate-furnace, series of tubes, and headers to which the tubes are connected, the combination therewith, of a drum located beneath and arranged in the same direction as the tubes, so as to receive the direct products of combustion of the fuel; connections between the ends of the drum and the headers; baffle-plates arranged across the boiler from the sides of the drum to the sides of the boiler; and doors located at the front of the boiler and opening to the upper surface of the baffle-plates.

2. In a steam-boiler comprising a grate-furnace, series of tubes arranged in inclined position, and headers, to which the tubes are connected, the combination therewith of a drum located beneath the tubes and with its upper side arranged parallel with and in the same direction as the tubes, so as to receive the direct heat of combustion of the fuel; connections between the ends of the drum and the headers; baffle-plates arranged across the boiler from the sides of the drum to the sides of the boiler; a transverse wall extending upwardly from the rear ends of the baffle-plates; another wall between this Wall and the front of the boiler extending from the top of the boiler to within a short distance of the baffleplates; and doors located at the front of the boiler and opening to the upper surface of the baffle-plates.

3. In a steam-boiler comprising a grate-furnace, series of tubes,vertically-arranged front and rear headers to which the tubes are connected, the combination therewith, of a drum located beneath and arranged in the same direction as the tubes, so as to receive the direct heat of combustion of the fuel; connect= ing-nipples joining the lower ends of the rear headers and the rear end of the drum; a horizontal header arranged above and connected to the front end of the drum; connections be tween this horizontal header and the lower ends of the front vertical headers; baffleplates arranged across the boiler from the sides of the drum to the sides of the boiler; and doors located at the front of the boiler beneath the horizontal header and opening to the upper surface of the baflle-plates.

4:. In a steam-boiler comprising a series of inclined tubes, and headers to which the tubes are connected and arranged at right angles to the tubes, the combination therewith of a conical drum, located beneath and arranged in the same direction as the tubes, so as to re= ceive the direct heat of combustion of the fuel, the large end of the drum being beneath the upper ends of the tubes; connections be= tween the ends of the drum and the headers; baffle-plates arranged across the boiler from the sides of the drum to the sides of the boiler; a transverse wall extending upwardly from the rear ends of the baffle-plates; another wall between this wall and the front of the boiler extending from the top of the boiler to within a short distance of the baffle-plates; and doors located at the front of the boiler and opening to the upper surface of the baflie-plates.

5. In a steam-boiler comprising a series of tubes inclined, vertically-arranged frontand rear headers to which the tubes are connected, the combination therewith, of a conical drum,

located beneath and arranged in the same dimotion as the tubes, so as to receive the direct heat of combustion of the fuel, the large end of the drum being beneath the upper ends of the tubes and placed in communication with the lower ends of the headers at these ends of the tubes; a horizontal header arranged above and in communication with the front end of the drum; connections between the horizontal header and the lower ends of the front vertical headers; bafiEle-plates arranged across the boiler from the sides of the drum to the sides of the boiler; a transverse wall extending upwardly from the rear ends of the bafiie-plates; another wall between this wall and the front of the boiler, extending from the top of the boiler to within a short distance of the baifle-plates; and doors located at the front of the boiler and opening to the upper surface of the baffie-plates.

Signed at Bayonne, in the county of Hudson and State of New Jersey, this 27th day of March, A. D. 1900.

JOHN J. CAIN Witnesses:

JAMES BENNY, ALFRED SHEDLOCKi, 

